1. Saponite and lizardite veins on the Island of Rhum;Ball;Clay Miner. Bull.,1964
2. Industrial applications of bentonite;Clem,1963
3. Contribución al estudio mineralógico del Trias Subbético;Dorronsoro;Estud. Geol.,1978
4. Foundry Sand Handbook,1963
5. Sepiolite-palygorskite in Spanish Tertiary basins. Genetical patterns in continental environments;Galán,1984